personally I would swap smite for sanctuary on the libby. Also I'm not quite sure what the role of your GM is. With the way he's kitted out it looks like he wants to get up close and personal while the rest of the army stands back and shoots. I would drop him for some hammers and razorbacks.

The G.M is there for his grand stratergy, I normaly use the reroll ones to wound (I also have a realy nice model for him and i like to use it), as for hammers I havent found a need for them yet, the might of titan takes care of this. Sanctuary is a better way to go then smite, tks.Have also droped the psy lancer and summoning for a H.Psy cannon.